Raspberry 3 + Asus MB168b

[FMK]

Hi,

I'm currently try to get my asus mb168b to work with my raspberry pi 3.

According to some research on the internet i needed to compile the raspberry kernel with support for displaylink framebuffer.

After some trail and error i finally got this running and I have now a running rpi 3 with kernel 4.4.42-v7+ with framebuffer support enabled.

Wen i plug in the asus display i get this message from dmesg:

[  165.803651] usb 1-1.4.2: USB disconnect, device number 7
[  170.749558] usb 1-1.4.2: new high-speed USB device number 8 using dwc_otg
[  170.850447] usb 1-1.4.2: New USB device found, idVendor=17e9, idProduct=ff03
[  170.850469] usb 1-1.4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  170.850483] usb 1-1.4.2: Product: MB168B
[  170.850495] usb 1-1.4.2: Manufacturer: DisplayLink
[  170.850508] usb 1-1.4.2: SerialNumber: G4LMTF010839

lsusb shows me the following output:

Bus 001 Device 008: ID 17e9:ff03 DisplayLink
[...]

Before i enabled the framebuffer support i was not able to install the displaylink drivers because of missing dkms stuff.

With the patched kernel i was able to install the drivers without any problems.

Since it didn't work after the driver installation i looked further and saw that some people said that the "old" udlfb driver was the problem and that one should use the new udl drivers.

So i blacklisted the old udlfb and enabled the new udl drivers.

lsmod:

Module                  Size  Used by
bnep                   10340  2
hci_uart               17943  1
btbcm                   5929  1 hci_uart
bluetooth             326067  22 bnep,btbcm,hci_uart
evdi                   36280  0
brcmfmac              186282  0
brcmutil                5661  1 brcmfmac
cfg80211              428833  1 brcmfmac
joydev                  9024  0
rfkill                 16018  4 cfg80211,bluetooth
snd_bcm2835            20447  1
snd_pcm                75890  1 snd_bcm2835
snd_timer              19288  1 snd_pcm
snd                    51908  5 snd_bcm2835,snd_timer,snd_pcm
bcm2835_gpiomem         3040  0
bcm2835_wdt             3225  0
evdev                  11396  6
uio_pdrv_genirq         3164  0
uio                     8000  1 uio_pdrv_genirq
udl                    21984  0
drm_kms_helper        101028  2 udl,evdi
drm                   262526  3 udl,evdi,drm_kms_helper
i2c_dev                 5859  0
fuse                   84037  3
ipv6                  347537  46

This also did not prove a solution to my problem as there is still no second framebuffer device besides the hdmi one.

What could i do to get the display working?

I've seen some blog posts of people that got the display working but they all had a second /dev/fb* device after booting with the new kernel.

Yours,
FMK